Extremely reliable, but somewhat high priced..
For a lift, I'd recommend either 4x4 Adventure Gear (
www.4x4ag.com, JohnC and AdrianS are members of this board), or Rovertym (
www.rovertym.com).
I'd recommend the same two companies for a bumper, 4x4ag's is quite a bit more cost efficient then Rovertyms, both are great bumpers though.
expeditionexchange.com is another great place for parts, but prices are high.
roversnorth.com is another good place, but is similiar to atlantic british.
Dap-inc.com has some great pricing, and you can get skid plates and what not from them.
rovertym.com also has a good reputation for their rock sliders (I have a pair, I love them)